Hi, Looking for ideas here folks. I've got an issue with my Mac that I can't seem to resolve. All of a sudden today, the Mac won't charge. It claims to still be drawing power from 85W USB-C charger, but not sure what will happen when the battery dies. Tried resetting SMC but no joy. Please tell me I don't have to take this to the Genius Bar and that there's another step I can take.